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Based on Creating sectors for telecom towers?, I'm facing one problem after creating the site sectors.

I can sucessufuly create all sectors with shape tool. After that I save my project and everything is ok. enter image description here

But if I close QGIS and reopen the project, my shape layer that should have all sectors, is now empty without features on attribute table. (image below) enter image description here

Can anyone explain me why this is happening?

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    Welcome to GIS SE! As a new user, please be sure to take the quick tour to learn about this site's focused Q&A format! – Andy Dec 20 '18 at 17:45
  • Looks like virtual layers >try save as *and set the CRS to the projection your are using. – Mapperz Dec 20 '18 at 19:49
  • It seems that in the answer presented by you shows a way to design point objects in the form of sectors of relay towers, you also need a tool to create sectors for some parameters... – Cyril Dec 21 '18 at 17:33
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New layer creation on QGIS would be in temporary form (like new excel file without saving on system), need to save this newly generated layer to local system folder by right click on layer>>Export>>Save Features as>>Choose Format>>Choose file name>>Tick: Add saved file to map

If the work space is saved from QGIS (Cntl+S>>File on local system) it could easily restores the project with the previously saved settings.

enter image description here enter image description here

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